Crucial; island - Crossword Clue

a generic term for any device whose possession entitles the holder to a means of access; "a safe-deposit box usually requires two keys to open it"

a list of words or phrases that explain symbols or abbreviations

serving as an essential component;

a list of answers to a test; "some students had stolen the key to the final exam"

any of 24 major or minor diatonic scales that provide the tonal framework for a piece of music

(basketball) a space (including the foul line) in front of the basket at each end of a basketball court; usually painted a different color from the rest of the court; "he hit a jump shot from the top of the key"; "he dominates play in the paint"

harmonize with or adjust to; "key one's actions to the voters' prevailing attitude"

a coral reef off the southern coast of Florida

regulate the musical pitch of

United States lawyer and poet who wrote a poem after witnessing the British atta